Expression of testicular angiotensin-converting enzyme in adult spontaneously hypertensive rats.

Recent studies demonstrated that one isoform of angiotensin-converting enzyme named testicular or germinal (tACE) is localized in postmeiotic male germ cells and is essential for fertilizing ability of spermatozoa. Hypertension in spontaneously hypertensive rats (SHR) is androgen-dependent and reduction in male gametes is reported in this experimental conditions. Expression of tACE was not studied under conditions of spontaneous hypertension.

Effect of zinc on the activity of Cu/Zn superoxide dismutase and lipid profile in Wistar rats.

Aim: The aim of the present study was to analyze the effect of zinc on the activity of Cu/ZnSOD, lipid profile and arterial blood pressure in male Wistar rats.

Material And Methods: The study included 53 male Wistar rats with basal weight 190-210 g. The animals were divided into three groups and put on diets with different zinc content.

[Clotting induction in the mesenterium and erosive stomach mucosa in wistar rats as the result of a catenoidal ultrasonic transducer].

The ultrasonic transducers and instruments used in surgery operate in the range of 1-10 MHz and release significant heat in the surroundings. They need additional cooling system which significantly raises the cost and impedes the equipment operation. Hemostasis can be successfully achieved by employing ultrasonic transducers that operate in the kilohertz range, avoiding the occurrence of inadmissible tissue overheat outside the area of the transducer performance.

[Interrelationship between the brain and kidney renin--angiotensin systems in combined hypertension: the effect of a central block with saralasin].

Conditions for Simultaneous stimulation of cerebral and renal renin-angiotension systems (RAS) are created in the examined by us model of combined cerebral and renal ischemic hypertension. As a results of interaction between them the effect o cerebral RAS predominates, since renin concentration in the medulla oblongata is elevated while the renal renin concentration remains unchanged, but the plasma renin activity is lowered. The blocking of the action of cerebral angiotension by the venously administered angiotensin antagonist saralasin does not alter substantially blood pressure, but causes elevation of the renal renin concentration in the ischemic and intact kidney and normalization of plasma renin activity, without affecting the level of sodium and potassium.